Re-organizes the Source Address options.
Change the organization for "Optional tasks" in the HTTP Request (separating into 3 sub-blocks : Embedded resources, Source Address, Optional tasks)
Bugzilla Id: 54874

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1513685 13f79535-47bb-0310-9956-ffa450edef68